<template>
  <div class="upload-container">
    <el-button :style="{background:color,borderColor:color}" icon="el-icon-upload" size="mini" type="primary" @click=" dialogVisible=true">
      添加图片
    </el-button>
    <el-dialog :visible.sync="dialogVisible" append-to-body>
      <el-upload :multiple="true" :file-list="fileList" :show-file-list="true" :on-remove="handleRemove" :on-success="handleSuccess" :before-upload="beforeUpload" class="editor-slide-upload" :action="action" :headers="headers" list-type="picture-card">
        <el-button size="small" type="primary">
          点击上传
        </el-button>
      </el-upload>
      <el-button @click="dialogVisible = false">
        取消
      </el-button>
      <el-button type="primary" @click="handleSubmit">
        保存
      </el-button>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: "EditorSlideUpload",
  props: {
    color: {
      type: String,
      default: "#1890ff",
    },
  },
  data() {
    const DT_TOKEN = this.$store.state.user.token
    return {
      action: this.$config.url + "/sys/oss/upload",
      headers: { DT_TOKEN },
      dialogVisible: false,
      listObj: {},
      fileList: [],
    };
  },
  methods: {
    checkAllSuccess() {
      return Object.keys(this.listObj).every(
        (item) => this.listObj[item].hasSuccess
      );
    },
    handleSubmit() {
      const arr = Object.keys(this.listObj).map((v) => this.listObj[v]);
      if (!this.checkAllSuccess()) {
        this.$message(
          "请等待所有图片上传成功。如果有网络问题，请刷新页面并重新上传!"
        );
        return;
      }
      this.$emit("successCBK", arr);
      this.listObj = {};
      this.fileList = [];
      this.dialogVisible = false;
    },
    handleSuccess(response, file) {
      // log(response);
      const uid = file.uid;
      const objKeyArr = Object.keys(this.listObj);
      for (let i = 0, len = objKeyArr.length; i < len; i++) {
        if (this.listObj[objKeyArr[i]].uid === uid) {
          this.listObj[objKeyArr[i]].url = response.url;
          this.listObj[objKeyArr[i]].hasSuccess = true;
          return;
        }
      }
    },
    handleRemove(file) {
      const uid = file.uid;
      const objKeyArr = Object.keys(this.listObj);
      for (let i = 0, len = objKeyArr.length; i < len; i++) {
        if (this.listObj[objKeyArr[i]].uid === uid) {
          delete this.listObj[objKeyArr[i]];
          return;
        }
      }
    },
    beforeUpload(file) {
      const _self = this;
      const _URL = window.URL || window.webkitURL;
      const fileName = file.uid;
      this.listObj[fileName] = {};
      return new Promise((resolve, reject) => {
        const img = new Image();
        img.src = _URL.createObjectURL(file);
        img.onload = function () {
          _self.listObj[fileName] = {
            hasSuccess: false,
            uid: file.uid,
            width: this.width,
            height: this.height,
          };
        };
        resolve(true);
      });
    },
  },
};
</script>

<style lang="scss" scoped>
.editor-slide-upload {
  margin-bottom: 20px;

  ::v-deep .el-upload--picture-card {
    width: 100%;
  }
}
</style>